$animation-timing: 300ms;

.help-center__container {
	.back-to-top-button__help-center {
		position: sticky;
		bottom: -35px;
		left: 0;
		z-index: 2;
		margin: 0 auto;


		display: flex;
		align-items: center;
		justify-content: center;

		visibility: hidden;
		opacity: 0;
		transition: visibility 0s linear $animation-timing, opacity $animation-timing;

		&.is-visible {
			visibility: visible;
			opacity: 1;
			transition: visibility 0s linear 0s, opacity $animation-timing;
		}
	}
}
